Plastic is something that is often used in our daily life. From small plastic bags, plastic bowls, beverage bottles, lunch boxes, and plastic wrap to large agricultural films, furniture, electrical appliances, 3D printing, and even rockets and missiles, plastic is present in all of them.
Plastic is an important branch of organic polymer materials, with many varieties, large output and wide application. For a wide variety of plastics, they can be classified as follows:
1. According to the behavior when heated, plastics can be divided into thermoplastics and thermosetting science according to the behavior when heated;
2. According to the reaction type of resin synthesis in plastics, resins can be divided into polymeric plastics and polycondensation plastics;
3. According to the ordered state of resin macromolecules, plastics can be divided into two types: amorphous plastics and crystalline plastics;
4. According to the performance and scope of application, plastics can be divided into general plastics, engineering plastics, and special plastics.
Among them, general-purpose plastics are the most widely used in our daily life. General-purpose plastics refer to plastics with large production volume, wide supply, low price, and suitable for a large number of applications. General-purpose plastics generally have good molding processability, and various processes can be used to form products for various purposes. General-purpose plastics include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), acrylonitrile/butadiene/styrene (ABS).
This time we mainly talk about the main properties and uses of polyethylene (PE). Polyethylene (PE) has excellent processing performance and use performance, and is the most widely used variety in synthetic resins. Its production capacity has long ranked first among all plastic varieties. Polyethylene resins mainly include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and high-density polyethylene (HDPE).
Polyethylene is widely used in my country, and film is its largest user, consuming about 77% of low-density polyethylene and 18% of high-density polyethylene. In addition, injection molding products, wires and cables, hollow products, etc. occupy a large share in its consumption structure. larger proportions. Among the five general-purpose resins, the consumption of PE ranks first. Polyethylene can be blow-molded to manufacture various bottles, cans, industrial tanks, barrels and other containers; injection-molded to manufacture various pots, barrels, baskets, baskets, baskets and other daily-use containers, daily-use sundries and furniture; extrusion molding Manufacture various pipes, straps, fibers, monofilaments, etc. In addition, it can also be used to make covering materials and synthetic paper for wires and cables. Among the many applications, the two main consumption areas of polyethylene are pipes and films. With the development of urban construction, agricultural film and various food, textile and industrial product packaging industries, the development of these two fields has become more and more extensive.
